US5970811A - Automatic speed-change apparatus for a gear transmission - Google Patents

Automatic speed-change apparatus for a gear transmission Download PDF

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Publication number
US5970811A
US5970811A US09/121,663 US12166398A US5970811A US 5970811 A US5970811 A US 5970811A US 12166398 A US12166398 A US 12166398A US 5970811 A US5970811 A US 5970811A
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US
United States
Prior art keywords
select
shift
gear
shaft
slider
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US09/121,663
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English (en)
Inventor
Toshio Imao
Eiji Takeyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aichi Machine Industry Co Ltd
Original Assignee
Aichi Machine Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP23541397A external-priority patent/JPH1163216A/ja
Priority claimed from JP23541497A external-priority patent/JPH1163217A/ja
Application filed by Aichi Machine Industry Co Ltd filed Critical Aichi Machine Industry Co Ltd
Assigned to AICHI KIKAI KOGYO KABUSHIKI KAISHA reassignment AICHI KIKAI KOGYO KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: IMAO, TOSHIO, TAKEYAMA, EIJI
Application granted granted Critical
Publication of US5970811A publication Critical patent/US5970811A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/32—Electric motors , actuators or related electrical control means  therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed- or reversing-gearings for conveying rotary motion
    • F16H59/68—Inputs being a function of gearing status
    • F16H59/72—Inputs being a function of gearing status dependent on oil characteristics, e.g. temperature, viscosity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19219—Interchangeably locked
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19219—Interchangeably locked
    • Y10T74/19251—Control mechanism
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19219—Interchangeably locked
    • Y10T74/19251—Control mechanism
    • Y10T74/19279—Cam operated

Definitions

  • the present invention relates to an automatic speed-change apparatus for a gear transmission.
  • an object of the invention is to provide an automatic speed-change apparatus which has a simple structure and can automatically change the shifting positions of a conventional gear transmission.
  • Another object of the present invention is to provide an automatic speed-change apparatus which is made in light weight, compact and at a low cost.
  • a further object of the present invention is to provide an automatic speed-change apparatus which has a sensor for detecting the moved amount of an automatically controlled component which sensor is disposed compact and has a high durability.
  • a still further object of the present invention is to provide an automatic speed-change apparatus which can stand against a high load and can rapidly operate owing to improved moving-speed of the components.
  • Still another object of the present invention is to provide an automatic speed-change apparatus which is free from troubles of oil leak and maintenance.
  • the automatic speed-change apparatus of the present invention has a select and a shift mechanism incorporated.
  • the select mechanism comprises a select stepping-motor, a select shaft provided with a select gear meshing with a motor gear for transferring the rotation, a select connecting-means for connecting the select shaft with the select-shift rod of the gear transmission, and a select sensor for detecting an angle of rotation of the select shaft; and the shift mechanism comprises a shift motor, an intermediate shaft fixedly having an actuator gear meshing with a motor gear for transferring the rotation, a long actuator gear provided on the periphery of the intermediate shaft, a shift shaft provided with a male screw on the periphery thereof, a cylindrical slider provided on the inner periphery thereof with a female screw meshing with the male screw and provided on the outer periphery thereof with a shift gear meshing with the long actuator gear, a shift connecting-means coupled with the slider for connecting the slider with the select-shift rod, and a stroke sensor for detecting an amount of the axial movement
  • FIG. 1 is a sectional view of an automatic speed-change apparatus for automatically changing the shift position of a gear transmission.
  • FIG. 2 is an exploded perspective view of a guide bracket and a slide piece and vicinity of a stroke sensor in FIG. 1.
  • FIG. 3 is an illustration of select operation.
  • FIG. 4 is a diagram of a shift pattern.
  • FIG. 5 is a sectional view of an automatic speed-change apparatus of another embodiment.
  • FIG. 6 is an illustration of select operation of another embodiment.
  • FIG. 7 is a diagram of a shift pattern of another embodiment.
  • FIG. 1 is a sectional view of an automatic speed-change apparatus 1 to be connected with a conventional gear transmission (not shown).
  • This automatic speed-change apparatus 1 is connected with a select-shift rod extended out of the gear transmission and adapted automatically to select lines of the shift fork in the gear transmission by rotating the select-shift rod on its axis and automatically to shift the gears in the gear transmission by moving the select-shift rod in the axial direction.
  • FIG. 1 shows the different conditions of the automatic speed-change apparatus 1 where the slider 17 and the sleeve 7 have been moved in different locations.
  • a select stepping-motor 2 which is controllable for forward and backward rotation, so that it can be controlled to rest at a desired angle of rotation.
  • a motor gear 3 On the motor shaft of this select stepping-motor 2 is fixedly provided a motor gear 3, which is made to mesh with a select gear 4.
  • This select gear 4 is fixedly provided on a select shaft 5.
  • a select sensor 6 On the left end, shown in the drawing, of the select shaft 5 is provided a select sensor 6 which can detect an operating angle of rotation of the select shaft 5.
  • select shaft 5 On the right periphery, shown in the drawing, of the select shaft 5 is fitted a sleeve 7 which is nonrotatable and movable in the axial direction only by means of slide keys 8.
  • the select stepping-motor 2, select gear 4, select shaft 5, select sensor 6, and sleeve 7 constitute a select mechanism which can rotate the select-shift rod of the gear transmission on its axis.
  • a shift motor 9 composed of an ordinary motor, on the motor shaft of which is fixedly provided a motor gear 10.
  • This motor gear 10 is made to mesh with an actuator gear 11 which is fixedly provided on an intermediate shaft 12.
  • On the periphery of the right side from the actuator gear 11, shown in the drawing, of the intermediate shaft 12 is fixedly fitted a long actuator gear 13 formed long in the axial direction.
  • This long actuator gear 13 is made to mesh with a shift gear 14, in the inside of which is fixed a female screw 16.
  • a slider 17 extending in the axial direction.
  • the female screw 16 is meshed with a male screw 15 fixedly fitted on the select shaft 5, which is formed long in the axial direction.
  • a connecting member S for coaxially connecting the select-shift rod of the gear transmission (not shown). Through this connecting member S the sleeve 7 is coaxially connected with the select-shift rod.
  • a slide piece 20 On the periphery of the shift gear 14 is disposed a slide piece 20, as shown in FIG. 2, extending over both side surfaces of the shift gear 14.
  • This slide piece 20 is axially movably mounted on a guide bracket 21 of which one end is fixed to the housing 1a; the inside of U-shaped slot 21a of the guide bracket 21 is inserted in guide grooves 20a formed in the slide piece 20.
  • the right surface of this slide piece 20, shown in the drawing is brought into contact with a contact member 19a extending from a stroke sensor 19. Consequently, this stroke sensor 19 is adapted to detect the amount of axial movement of the shift gear 14 and slider 17 according to the amount of axial movement of the contact member 19a in contact with the slide piece 20. Since the contact member 19a is not directly brought into contact with the shift gear 14, it is prevented for the contact member 19a to be wore or for the shaft of the stroke sensor 19 to be bent.
  • the actuator gears 3, 4, 10, 11, 13, 14 are respectively formed of nylon resin.
  • the bearing 18 is composed of a prelubricated ball bearing.
  • the male screw 15 is formed of carbon steel and the female screw 16 is formed of brass.
  • the slide key 8 is formed of polyimide resin.
  • the plain bearings for the sliders 17 and the sleeve 7 are made of PTFE resin.
  • the automatic speed-change apparatus 1 of this embodiment is constituted in the dry condition by using the materials and components which are usable without oiling, so that it is possible to be free of the maintenance.
  • the apparatus 1 comes to have a structure that can endure high loads and can increase the moving speed of the slider 17.
  • the shift motor 9 is made in no load condition.
  • the select gear 4 is rotated following the rotation of the motor gear 3, accordingly the select shaft 5 is rotated, also the sleeve 7 fitted on this select shaft 5 is rotated, and then the select-shift rod of the gear transmission (not shown) is rotated in connected condition with the sleeve 7.
  • the angle of rotation of this select-shift rod can be controlled in a desired angle of rotation by gradationally operating the select stepping-motor 2.
  • the detecting signal from the select sensor 6 is returned as a feedback, and the select-shift rod is displaced through the sleeve 7 in an angle of rotation corresponding to the desired select-line.
  • the select operation is performed to select a line of the shift fork in the inside of the gear transmission.
  • the select stepping-motor 2 is stopped at a desired angle to generate a holding force and thereby the select shaft 5 is made in a stationary condition where no rotation is allowable. Consequently, the male screw 15 fitted on the select shaft 5 is also held in a stationary condition.
  • the intermediate shaft 12 is rotated through the actuator gear 11, and accordingly the long actuator gear 13 is rotated to transfer the rotating force to the shift gear 14.
  • the shift gear 14 is rotated, the slider 17 is moved as it rotates through the female screw 16 on the male screw 15 in the axial direction or in the right direction, shown in the drawing. Following this, the shift gear 14 is axially moved as it rotates meshing with the long actuator gear 13.
  • the select-shift rod of the gear transmission (not shown), connected with the sleeve 7, is axially moved to operate the shift fork subsequently in the inside of the gear transmission, so that the shift operation of the gear can be performed in the gear transmission.
  • the amount of the axial movement of the slider 17 is detected by the above-described stroke sensor 19, and this detecting signal is returned as a feedback to the shift motor 9 to control it, and thereby the sleeve 7 is axially moved to the desired location and the gear transmission is shifted to the desired shift position.
  • this embodiment can automatically perform the efficient select and shift operations in a simple structure having two motors for select and shift.
  • FIG. 5 is a sectional view of an automatic speed-change apparatus 41 as another embodiment of the present invention.
  • This automatic speed-change apparatus 41 is connected with a select-shift rod Q extended out of the conventional gear transmission and adapted automatically to select lines of the shift fork in the gear transmission by moving the select-shift rod Q in the axial direction and automatically to shift the gears in the gear transmission by rotating the select-shift rod Q on its axis.
  • the automatic speed-change apparatus 41 in FIG. 5 is surrounded by a housing 41a, and in the upper portion is disposed a select stepping-motor 2.
  • a motor gear 3 On the motor shaft of this select stepping-motor 2 is fixed a motor gear 3, which is meshed with a select gear 31 formed in a sector.
  • the select gear 31 is fixed to a select shaft 33 with a fixing pin 32.
  • a select sensor 6 On the upper end of the select shaft 33 is provided a select sensor 6 for detecting the angle of rotation of the select shaft 33.
  • a sellect lever 35 On the lower end of the select shaft 33 is fixedly provided a sellect lever 35 through a fixing pin 34, and the select shaft 33 is rotatably supported with ball-bearings 36.
  • the select lever 35 is connected at the tip end 35a with a select shift lever 38, which is fixed to the select-shift rod Q through a fixing pin 37.
  • the select-shift rod Q is extended out of the gear transmission (not shown) to connect the automatic speed-change apparatus 41 with the gear transmission.
  • the select-shift lever 38 is engaged at its tip 38a with a coupling member 23 which will be described later.
  • the select stepping-motor 2, motor gear 3, select gear 31, select shaft 33, select lever 35, select-shift lever 38, and select sensor 6 constitute a select mechanism.
  • a shift motor 9 On the housing 41a is, provided a shift motor 9, on the motor shaft of which is fixedly provided a motor gear 10.
  • This motor gear 10 is made to mesh with an actuator gear 11 which is fixedly provided on an intermediate shaft 12 which is rotatably supported through ball-bearing.
  • On the periphery of the intermediate shaft 12 is fixedly fitted, through a pin, a long actuator gear 13 formed long in the axial direction.
  • This long actuator gear 13 is made to mesh with a shift gear 14, in the inside of which is fixed a female screw 16.
  • a slider 17 extending in the axial direction.
  • the female screw 16 in the inside of the shift gear 14 is meshed with a male screw 15 which is inserted and fixed through a key on the periphery of a shift shaft 22 fixedly provided on the housing 41a. Thereby, the shift gear 14 can axially move along this male screw 15.
  • a sleeve 7 through a slide key 8 unrotatably on its axis and movably in the axial direction only.
  • This sleeve 7 is connected with the end of the slider 17 through a slider bearing 18.
  • a coupling member 23 On the other end of the sleeve 7 is provided a coupling member 23, which is connected with the tip of the select-shift lever 38.
  • a slide piece 20 extending over both end surfaces of the shift gear 14, as shown in the exploded view of FIG. 2.
  • This slide piece 20 is axially movably mounted on a guide bracket 21 of which one end is fixed to the housing 41a; the inside of U-shaped slot 21a of the guide bracket 21 is inserted in guide grooves 20a formed in both sides of the slide piece 20.
  • This slide piece 20 is brought into contact with a contact member 19a of a stroke sensor 19.
  • This stroke sensor 19 is adapted to detect the amount of axial movement of the slider 17.
  • the automatic speed-change apparatus 41 of this embodiment is also constituted in the dry condition by using the materials and components which are usable without oiling, so that it is possible to be free of the maintenance.
  • the apparatus 41 comes to have a structure that can endure high loads and can increase the moving speed.
  • the select stepping-motor 2 is made in operation, thereby the motor gear 3 is rotated, and through the select gear 31 in a sector form the select shaft 33 is displaced in the direction of rotation. Accordingly, the select lever 35 fixed to the select shaft 33 is swung, and the select-shift rod Q is moved in its axial direction through the select-shift lever 38, as shown in FIG. 6. In this case, the detecting signal from the select sensor 6 is returned as a feedback properly to control the select stepping-motor 2, and the select-shift rod Q is caused to move in the desired select line.
  • the coupling member 23 is axially moved, causing the tip 38a of the select-shift lever 38 to swing, so that the select-shift rod Q is caused to be displaced in the direction of rotation.
  • the amount of the axial movement of the slider 17 is detected by the above-described stroke sensor 19, and this detecting signal is returned as a feedback to the shift motor 9 to control it.
  • the select-shift rod Q is displaced to the desired shift position, and the shift operation comes to be completed.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Gear-Shifting Mechanisms (AREA)
US09/121,663 1997-08-15 1998-07-23 Automatic speed-change apparatus for a gear transmission Expired - Fee Related US5970811A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP9-235414 1997-08-15
JP23541397A JPH1163216A (ja) 1997-08-15 1997-08-15 歯車式変速機の自動変速装置
JP9-235413 1997-08-15
JP23541497A JPH1163217A (ja) 1997-08-15 1997-08-15 歯車式変速機の自動変速装置

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US5970811A true US5970811A (en) 1999-10-26

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Country Status (4)

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US (1) US5970811A (de)
EP (1) EP0898099B1 (de)
KR (1) KR19990023625A (de)
DE (1) DE69810030T2 (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6062097A (en) * 1998-01-12 2000-05-16 Aichi Kikai Kogyo Kabushiki Kaisha Automatic speed-change apparatus for a gear transmission
US6155126A (en) * 1999-10-18 2000-12-05 Borgwarner Inc. Integrated shift motor and electronic controller
US20010003250A1 (en) * 1999-12-08 2001-06-14 Shiro Ogami Automatic gear transmission
US6286379B1 (en) * 1999-05-07 2001-09-11 Ford Global Technologies, Inc. Method for shifting multi-speed axles
US20030057911A1 (en) * 2001-09-26 2003-03-27 Yoshifumi Kuwano Stepping motor controller
US6561052B2 (en) * 2000-04-04 2003-05-13 Hitachi, Ltd. Automatic transmission
US20050092115A1 (en) * 2003-10-31 2005-05-05 Walker Stuart J. Automated manual transmission and shift method
CN101825174A (zh) * 2010-03-09 2010-09-08 西南大学 发动机自适应传动传感电控自动变速装置
CN102537325A (zh) * 2010-12-18 2012-07-04 陕西国力信息技术有限公司 具有电动控制的机动车气动换档方法
CN102797800A (zh) * 2012-09-03 2012-11-28 重庆通盛建设工业有限公司 一种电动车用换挡变速系统
CN104482198A (zh) * 2014-12-11 2015-04-01 东风汽车公司 电控电动amt选换档执行机构总成
US11486470B2 (en) 2020-02-04 2022-11-01 Dana Heavy Vehicle Systems Group, Llc Methods and systems for an actuation system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000145957A (ja) * 1998-11-13 2000-05-26 Aichi Mach Ind Co Ltd 歯車式変速機の自動変速装置
JP4320994B2 (ja) * 1999-10-27 2009-08-26 日本精工株式会社 変速機用電動駆動装置
DE102004041753A1 (de) * 2004-08-28 2006-03-02 Zf Friedrichshafen Ag Wählantrieb für automatisierte Schaltgetriebe von Kraftfahrzeugen
CN104896084A (zh) * 2015-05-28 2015-09-09 浙江联宜电机股份有限公司 紧凑型电动车amt换挡机构

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DE19734023A1 (de) * 1996-08-06 1998-02-12 Luk Getriebe Systeme Gmbh Kraftfahrzeug
EP0843112A2 (de) * 1996-11-19 1998-05-20 Aichi Kikai Kogyo Kabushiki Kaisha Gangschaltvorrichtung für ein automatisiertes, mechanisches Schaltgetriebe
US5794381A (en) * 1995-12-22 1998-08-18 Ricon Corporation Selectively engageable motor drive assembly
US5809836A (en) * 1996-03-15 1998-09-22 Mercedes-Benz Ag Shift device for a change speed gearbox

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Publication number Priority date Publication date Assignee Title
US3434364A (en) * 1967-08-08 1969-03-25 Rockwell Standard Co Vehicle drive assembly
JPS6151697A (ja) * 1984-08-21 1986-03-14 Meidensha Electric Mfg Co Ltd 不揮発性メモリへのデ−タストア方法
US5150629A (en) * 1991-09-12 1992-09-29 General Motors Corporation Electro-mechanical power controller for a gear shift mechanism
JPH05256359A (ja) * 1992-03-12 1993-10-05 Honda Motor Co Ltd 保持機能付き電動アクチュエータ
US5305240A (en) * 1992-11-25 1994-04-19 Eaton Corporation Computer controlled method of calibrating an x-y shifter
US5590563A (en) * 1993-09-27 1997-01-07 Mazda Motor Corporation Electronically controlled transmission
DE19627980A1 (de) * 1995-07-12 1997-01-16 Luk Getriebe Systeme Gmbh Betätigungsvorrichtung
US5794381A (en) * 1995-12-22 1998-08-18 Ricon Corporation Selectively engageable motor drive assembly
US5809836A (en) * 1996-03-15 1998-09-22 Mercedes-Benz Ag Shift device for a change speed gearbox
DE19734023A1 (de) * 1996-08-06 1998-02-12 Luk Getriebe Systeme Gmbh Kraftfahrzeug
DE29622669U1 (de) * 1996-09-23 1997-03-27 Fichtel & Sachs Ag, 97424 Schweinfurt Stelleinrichtung eines in zwei Bewegungsarten bewegbaren Ausgangsteils
EP0843112A2 (de) * 1996-11-19 1998-05-20 Aichi Kikai Kogyo Kabushiki Kaisha Gangschaltvorrichtung für ein automatisiertes, mechanisches Schaltgetriebe

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6062097A (en) * 1998-01-12 2000-05-16 Aichi Kikai Kogyo Kabushiki Kaisha Automatic speed-change apparatus for a gear transmission
US6286379B1 (en) * 1999-05-07 2001-09-11 Ford Global Technologies, Inc. Method for shifting multi-speed axles
US6155126A (en) * 1999-10-18 2000-12-05 Borgwarner Inc. Integrated shift motor and electronic controller
US6367344B1 (en) * 1999-10-18 2002-04-09 Borgwarner Inc. Integrated motor and electronic controller
US20010003250A1 (en) * 1999-12-08 2001-06-14 Shiro Ogami Automatic gear transmission
US6397696B2 (en) * 1999-12-08 2002-06-04 Aisin Ai Co., Ltd. Automatic gear transmission
US6561052B2 (en) * 2000-04-04 2003-05-13 Hitachi, Ltd. Automatic transmission
US6747433B2 (en) * 2001-09-26 2004-06-08 Japan Servo Co., Ltd. Stepping motor controller
US20030057911A1 (en) * 2001-09-26 2003-03-27 Yoshifumi Kuwano Stepping motor controller
US20050092115A1 (en) * 2003-10-31 2005-05-05 Walker Stuart J. Automated manual transmission and shift method
US6935204B2 (en) 2003-10-31 2005-08-30 Caterpillar Inc Automated manual transmission and shift method
CN101825174A (zh) * 2010-03-09 2010-09-08 西南大学 发动机自适应传动传感电控自动变速装置
CN101825174B (zh) * 2010-03-09 2013-04-24 西南大学 发动机自适应传动传感电控自动变速装置
CN102537325A (zh) * 2010-12-18 2012-07-04 陕西国力信息技术有限公司 具有电动控制的机动车气动换档方法
CN102797800A (zh) * 2012-09-03 2012-11-28 重庆通盛建设工业有限公司 一种电动车用换挡变速系统
CN104482198A (zh) * 2014-12-11 2015-04-01 东风汽车公司 电控电动amt选换档执行机构总成
CN104482198B (zh) * 2014-12-11 2017-11-24 东风汽车公司 电控电动amt选换档执行机构总成
US11486470B2 (en) 2020-02-04 2022-11-01 Dana Heavy Vehicle Systems Group, Llc Methods and systems for an actuation system
US11933397B2 (en) 2020-02-04 2024-03-19 Dana Heavy Vehicle Systems Group, Llc Methods and systems for an actuation system

Also Published As

Publication number Publication date
DE69810030D1 (de) 2003-01-23
EP0898099A2 (de) 1999-02-24
KR19990023625A (ko) 1999-03-25
DE69810030T2 (de) 2003-04-17
EP0898099A3 (de) 1999-06-30
EP0898099B1 (de) 2002-12-11

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